<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 提示区域 -->
            <el-alert title="添加商品信息" type="info" show-icon center :closable='false'>
            </el-alert>

            <el-steps :space="200" :active="activeindex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <!-- tab栏区域 -->
            <el-form :label-position=" 'top' " :model="addForm" :rules="addFormrules" ref="ruleForm"
                label-width="100px">
                <!--             也可以 " 'left' "              -->
                <el-tabs v-model='activeindex' :tab-position="tabPosition" :before-leave='beforeTabLeave'
                    @tab-click='tabClick'>
                    <el-tab-pane label="基本信息" name='0'>
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type='number'></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type='number'></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type='number'></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader v-model="addForm.goods_cat" :options="catelist" :props="cateProps"
                                @change="handleChange"></el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name='1'>
                        <!-- 渲染表单item项 -->
                        <el-form-item :label="item.attr_name" prop="" v-for='item in manyTableData' :key="item.attr_id">
                            <!-- 复选框 -->
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox border :label="it" v-for='(it,index) in item.attr_vals' :key="index">
                                </el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name='2'>
                        <el-form-item label="商品分类" :label="item.attr_name" v-for='(item,index) in onlyTableData'
                            :key="item.attr_id">
                            <el-input v-model='item.attr_vals'></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name='3'>
                        <!-- action-图片要上传到后台的API地址  -->
                        <el-upload class="upload-demo" :action="uploadURL" :on-preview="handlePreview"
                            :on-remove="handleRemove" list-type="picture" :headers='headersObj'
                            :on-success='handleSuccess'>
                            <el-button size="small" type="primary">点击上传</el-button>
                            <!-- <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div> -->
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name='4'>
                        <!-- 副文本编辑器组件 -->
                        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                        <!-- 添加商品 -->
                        <el-button type="primary" @click="add">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>

        <!-- 图片预览 -->
        <el-dialog title="图片预览" :visible.sync="previewVisible" width="80%">
            <img :src="previewPath" alt="" class="previewimg">
        </el-dialog>
    </div>
</template>

<script>
    // 深拷贝
    import _ from 'lodash'
    export default {
        name: 'add',
        data() {
            return {
                activeindex: '0',
                //控制 标签页 位置
                tabPosition: 'left',
                // 添加商品的表单数据对象
                addForm: {
                    goods_name: '',
                    goods_price: 0,
                    goods_weight: 0,
                    goods_number: 0,
                    // 商品所属的分类数组
                    goods_cat: [],
                    //图片的数组
                    pics: [],
                    //商品的详情内容
                    goods_introduce: '',
                    attrs: []
                },
                //添加商品的校验规则
                addFormrules: {
                    goods_name: [
                        { required: true, message: '请输入商品名称！', trigger: 'blur' },
                    ],
                    goods_price: [
                        { required: true, message: '请输入商品价格！', trigger: 'blur' },
                    ],
                    goods_weight: [
                        { required: true, message: '请输入商品重量！', trigger: 'blur' },
                    ],
                    goods_number: [
                        { required: true, message: '请输入商品数量！', trigger: 'blur' },
                    ],
                    goods_cat: [
                        { required: true, message: '请选择商品分类！', trigger: 'blur' },
                    ],
                },
                // 商品分类列表
                catelist: [],
                // 级联选择器 的配置信息
                cateProps: {
                    value: 'cat_id',
                    label: 'cat_name',
                    children: 'children',
                    expandTrigger: 'hover',
                },
                // 动态 参数列表数据
                manyTableData: [],
                // 静态 参数列表数据
                onlyTableData: [],
                // 上传图片的URL地址
                uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
                //图片上传组件的headers请求头对象
                headersObj: {
                    Authorization: window.sessionStorage.getItem('token')
                },
                // 预览图片的地址
                previewPath: '',
                //预览图片的显示与隐藏
                previewVisible: false
            }
        },
        created() {
            this.getCateList()
        },
        methods: {
            // 获取所有的商品分类数据
            async getCateList() {
                const { data: res } = await this.$http.get(`categories`)
                // console.log(res,101);
                if (res.meta.status !== 200) {
                    return this.$message.error("获取商品分类数据失败！")
                }
                this.catelist = res.data
                // console.log(this.catelist);
            },
            // 级联选择器选中项发生变化，会触发这个函数
            handleChange() {
                // console.log(this.addForm.goods_cat);
                if (this.addForm.goods_cat.length < 3) {
                    this.addForm.goods_cat = []
                }
            },
            // tab 标签页切换 触发
            beforeTabLeave(activeName, oldActiveName) {
                // console.log(activeName, oldActiveName);
                if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
                    this.$message.error('请先选择商品分类！')
                    return false
                }
            },
            // tab 标签页点击 触发
            async tabClick() {
                // 激活的标签页
                // console.log(this.activeindex);
                //证明 访问的是动态参数面板
                if (this.activeindex === '1') {
                    const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
                        params: { sel: 'many' }
                    })
                    // console.log(res);
                    if (res.meta.status !== 200) {
                        return this.$message.error("获取商品动态参数失败！")
                    }
                    res.data.forEach(item => {
                        item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(',')
                    })
                    this.manyTableData = res.data
                    console.log(this.manyTableData, '动态参数');
                }
                //证明 访问的是静态参数面板
                if (this.activeindex === '2') {
                    const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
                        params: { sel: 'only' }
                    })
                    // console.log(res);
                    if (res.meta.status !== 200) {
                        return this.$message.error("获取商品静态参数失败！")
                    }
                    this.onlyTableData = res.data
                    console.log(this.onlyTableData, '静态参数');
                }
                if (this.activeindex === '3') {

                }
            },
            // 处理图片预览效果
            handlePreview(file) {
                // console.log(file);
                this.previewPath = file.response.data.url
                this.previewVisible = true
            },
            // 处理移除图片的操作
            handleRemove(file) {
                // console.log(file);
                // 1，获取将要删除的图片的临时路径
                const filePath = file.response.data.tmp_path
                // 2.从pics数组中，找到这个图片对应的索引值
                const i = this.addForm.pics.findIndex(x => {
                    x.pic === filePath
                })
                // 3．调用数组的splice方法，把图片信息对象，从pics数组中移除|
                this.addForm.pics.splice(i, 1)
                // console.log(this.addForm);
            },
            // 监听图片上传成功的事件
            handleSuccess(response) {
                // console.log(response);
                //1，拼接得到一个图片信息对象
                const picInfo = { pic: response.data.tmp_path }
                //2．将图片信息对象，push 到pics数组中
                this.addForm.pics.push(picInfo)
                // console.log(this.addForm);
            },
            //添加商品
            add() {
                //预验证
                // console.log(this.addForm);
                this.$refs.ruleForm.validate(async valid => {
                    if (!valid) return this.$message.error('请填写必要的表单项！')
                    //添加逻辑
                    const form = _.cloneDeep(this.addForm)
                    form.goods_cat = form.goods_cat.join(',')
                    // console.log(form,11);
                    // 处理 动态参数
                    this.manyTableData.forEach(item => {
                        const newInfo = {
                            attr_id: item.attr_id,
                            attr_value: item.attr_vals.join(' ')
                        }
                        this.addForm.attrs.push(newInfo)
                    })
                    // 处理 静态参数
                    this.onlyTableData.forEach(item => {
                        const newInfo = {
                            attr_id: item.attr_id,
                            attr_value: item.attr_vals
                        }
                        this.addForm.attrs.push(newInfo)
                    })
                    form.attrs = this.addForm.attrs
                    // console.log(form);
                    //发起请求添加商品
                    const { data: res } = await this.$http.post(`goods`, form)
                    // console.log(res,101);
                    if (res.meta.status !== 201) {
                        return this.$message.error('创建商品失败！')
                    }
                    this.$message.success('创建商品成功！')
                    //刷新数据
                    this.$router.push('/goods')
                })
            }
        },
        computed: {
            cateId() {
                if (this.addForm.goods_cat.length === 3) {
                    return this.addForm.goods_cat[2]
                }
                return null
            }
        }
    }
</script>

<style scoped>
    .el-steps {
        margin: 15px 0;
    }

    .el-checkbox {
        margin: 0 5px !important;
    }

    .previewimg {
        /* height: 100%; */
        width: 100%;
    }

    .el-button {
        margin-top: 13px;
    }
</style>